A researcher is investigating motivation of people to exercise. A study is undertaken to investigate the source of motivation and the longevity of the results. Four participants receive calls from a human trainer. Four participants receive a call from an automated system, and four participants receive no calls. The number of minutes spent exercising per week are recorded at the beginning of the program, after six months, and after one year.
a) Fill in the table below
Source SS df MS F
b) Suppose the F statistics are shown below. What would you conclude?
1) F stat = 6.48
2) F stat = 5.91
3) F stat = 6.89